Growth of Red Clover bxj different Manures. 
187 
although the ammonia-salts and the rape-cake seemed to have 
provided conditions in the soil very injurious to tlie hcaltliy 
development of the Clover, the sulphate of potash, and supor- 
j)hosphate of lime (Plots 4), and the sulphates of potash, soda, 
and magnesia, both with and without superphosphate of lime 
(Plots 5 and 6), obviously greatly mitigated the injury, whilst they 
seem almost to have prevented it, up to the date now in question, 
where they were used without either ammonia-salts or rape-cake. 
In some cases, as will be readily seen from the number and the 
size of the patches, the produce was considerably reduced by the 
disease. But there was still, upon the whole, a good plant 
remaining, and such variety of result in regard to the disease, 
according to the manure employed, that it was thought quite 
worth while to continue the experiment. Acordingly, the crop 
was cut on June 24, fresh manures were applied on June 2G, 
and a second crop was cut August 29. In Table IV. are given 
the amounts of produce obtained at the first cutting, the descrip- 
tion and amount of the manures ap})lied, and the amount of 
produce at the second cutting. 
The produce of the first cutting of the clover, in 1852, is given 
in the first two columns of the Table (IV.). It will be seen that 
it is in no case equal in amount to 2 tons of hay per acre. On 
comparing the amount of crop on the plots of one Series with that 
on those of another, it is seen that it is generally the highest where 
only the mineral manures were used, that is, in Series 1, It is 
the next best in Series 2, where, in addition to mineral manures, 
dung and lime had been used in 1851. It is less in Series 3, 
where, with the same mineral manures in 1851, as in Series- 
1 and 2, ammonia-salts, with or without mineral manures, 
had been employed in 1849 ; and it is the worst in Series 4, 
where rape-cake had been supplied in 1849, and soot, lime, &c., 
in 1851. The results within each Series, however, show a greater 
produce where sulphate of potash and superphosphate of lime, 
the " mixed alkalies," and the " mixed alkalies " and super- 
phosphate of lime together, were employed. 
There was then, as before, some benefit arising from the use 
of mineral manures, especially those which contained potash and 
phosphoric acid. And as the object of the experiments was to 
ascertain whether by liberal manuring, and especially by a supply 
of the mineral constituents which the Clover crop removes so 
largely from the soil, it were possible to grow the crop year after 
year on the same land, an abundant top-dressing of mineral con- 
stituents was applied on June 28 (1852), after the removal of 
the first cutting. The second division of the Table (IV.) shows 
the description, and amount, of the manures employed ; and the 
third division the amount of crop obtained on August 29. 
